Chapter 12 Flashcards _ Quizlet

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Microbiology Chapter 12

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Terms in this set (54)

Key concepts:

Carbon Dioxide Fixation Acyl Carrier Protein Calvin Benson Cycle

Large structures (e.g., ribosomes) form spontaneously from their macromolecular components by a process known as

self-assembly

Eukaryotic cells compartmentalize some anabolic and catabolic pathways so that these

independently

10/10/2020 Microbiology Chapter 12 Flashcards | Quizlet

pathways can be operate

Cells save energy and materials by using many

of the same enzymes for both and

anabolism; catabolism

Different proteins have different amino acid

sequences

Many enzyme catalyzed reactions are freely reversible; however, some key steps require separate enzymes for the reverse step in order

to provide for independent regulation

of anabolic and catabolic pathways

TRUE

Nongrowing cells continuously degrade and resynthesize cellular molecules during a process known as cellular turnover

TRUE

The use of compartmentation for the simultaneous but independent regulation

of anabolic and catabolic pathways occurs generally in eukaryotes but not in prokaryotes

TRUE

Anabolic and catabolic pathways use different cofactors for similar reactions

TRUE

In the synthesis of amino acids the addition of the amino nitrogen usually occurs the synthesis of the carbon skeletons

after

10/10/2020 Microbiology Chapter 12 Flashcards | Quizlet

Although most autotrophic microorganisms fix carbon dioxide using the Calvin-Benson cycle, this pathway is absent in the Archaea

TRUE

Photoautotrophs are the only organisms that can incorporate (fix) carbon dioxide into

biomolecules

FALSE

Because peptidoglycan lies outside the plasma membrane, all steps in the complex synthesis process of this molecule takes place outside the cell

FALSE

Nitrogen fixation is used

to form ATP, which is then used for energy reserves

FALSE

In the biosynthesis of nucleotides, pyrimidines are assembled starting with ribose-5-phosphate while

ribose-5-phosphate is added after synthesis of the

nitrogenous base for purines

FALSE

Unsaturated fatty acids are those containing carbon-carbon

bonds

double

10/10/2020 Microbiology Chapter 12 Flashcards | Quizlet

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